#app,
body,
html {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}
* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family:
    'Helvetica Neue', Helvetica, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑',
    Arial, sans-serif;
}
.theme {
  transition: all 0.3s ease;
}
/* 滚动条凹槽的颜色，还可以设置边框属性 */
*::-webkit-scrollbar-track-piece {
  border-radius: 2em;
  background-color: #f8f8f8;
}

/* 滚动条的宽度 */
*::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}

/* 滚动条的设置 */
*::-webkit-scrollbar-thumb {
  border-radius: 2em;
  background-clip: padding-box;
  background-color: #ddd;
}

/* 滚动条鼠标移上去 */
*::-webkit-scrollbar-thumb:hover {
  background-color: #bbb;
}
